But when LY -ve amount CY +ve amount How to make it display +ve % , now it display -ve % which is not correct , because lst year lost money and CY make money , logical is +Ve , But in math it will compute -ve .

Now it display -706% (is correct if you manual cal ), how to make it display +706 % , Yet when LY +ve and CY +ve it also able to compute correct % ?